MongoDB Practice Test 3

1. Which of the following pattern is more straightforward to use?

Array of Ancestors

Nested Sets

None of the mentioned

Materialized Paths

2. To add structures to your document to support keyword-based queries add the keywords as ______ in the array.

number

character

none of the mentioned

strings

3. How will avoid mutable, growing arrays in the following schema?

{
   name: "O'Reilly Media",
   founded: 1980,
   location: "CA",
   books: [12346789, 234567890, ...]
}

{
    _id: 123456789,
    title: "MongoDB: The Definitive Guide",
    author: [ "Kristina Chodorow", "Mike Dirolf" ],
    published_date: ISODate("2010-09-24"),
    pages: 216,
    language: "English"
}

{
   _id: 234567890,
   title: "50 Tips and Tricks for MongoDB Developer",
   author: "Kristina Chodorow",
   published_date: ISODate("2011-05-06"),
   pages: 68,
   language: "English"
}

{
   _id: "oreilly",
   name: "O'Reilly Media",
   founded: 1980,
   location: "CA"
}

[
   _id: 123456789,
   title: "MongoDB: The Definitive Guide",
   author: [ "Kristina Chodorow", "Mike Dirolf" ],
   published_date: ISODate("2010-09-24"),
   pages: 216,
   language: "English",
   publisher_id: "oreilly"
]

[
   _id: 234567890,
   title: "50 Tips and Tricks for MongoDB Developer",
   author: "Kristina Chodorow",
   published_date: ISODate("2011-05-06"),
   pages: 68,
   language: "English",
   publisher_id: "oreilly"
]

{
   _id: "oreilly",
   name: "O'Reilly Media",
   founded: 1980,
   location: "CA"
}

{
   _id: 123456789,
   title: "MongoDB: The Definitive Guide",
   author: [ "Kristina Chodorow", "Mike Dirolf" ],
   published_date: ISODate("2010-09-24"),
   pages: 216,
   language: "English",
   publisher_id: "oreilly"
}

{
   _id: 234567890,
   title: "50 Tips and Tricks for MongoDB Developer",
   author: "Kristina Chodorow",
   published_date: ISODate("2011-05-06"),
   pages: 68,
   language: "English",
   publisher_id: "oreilly"
}

{
   _id: "oreilly",
   name: "O'Reilly Media",
   founded: 1980,
   location: "CA"
}

[
   _id: 123456789,
   title: "MongoDB: The Definitive Guide",
   author: [ "Kristina Chodorow", "Mike Dirolf" ],
   published_date: ISODate("2010-09-24"),
   pages: 216,
   language: "English",
   publisher_id: "oreilly"
]

{
   _id: 234567890,
   title: "50 Tips and Tricks for MongoDB Developer",
   author: "Kristina Chodorow",
   published_date: ISODate("2011-05-06"),
   pages: 68,
   language: "English",
   publisher_id: "oreilly"
}

None of the mentioned

4. The ____________ pattern identifies each node in the tree as stops in a round-trip traversal of the tree.

Nested Sets

Materialized Paths

None of the mentioned

Array of Ancestors

5. _________ is a binary serialization format used to store documents and make remote procedure calls in MongoDB.

None of the mentioned

BSON

GridFS

JSON

6. The files_id field contains the _id of the chunk’s __________ document.

none of the mentioned

parent

child

top

7. The ________ Links pattern provides a simple solution to tree storage but requires multiple queries to retrieve subtrees.

Parent

Child

All of the mentioned

Root

8. Point out the wrong statement.

If you need to query the database for exact, mathematically valid matches, use Ambiguity Precision

The default chunk size changed from 256k to 255k

None of the mentioned

Chunks in the context of GridFS is related to the use of the term chunks in the context of sharding

9. Point out the correct statement.

The query to retrieve the parent of a node is slow and straightforward

The query to retrieve the parent of a node is fast and straightforward

All of the mentioned

The query to retrieve the parent of a node is slow and complex

10. To store documents larger than the maximum size, MongoDB provides the _______ API.

GridFS

Grid

MMS

None of the mentioned